Battery charger



FIG. 1 is a perspective view of a battery charger according to the invention.

FIG. 2 is a left elevational view thereof.

FIG. 3 is a right elevational view thereof.

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

In the above drawings, any broken line illustration is not part of the design sought to be patented. 

The ornamental design for a battery charger, as shown and described. 